“Mastering the Command Line’’
1. ls — The most frequently used command in Linux to list directories
2. pwd — Print working directory command in Linux
3. cd — Linux command to navigate through directories
4. mkdir — Command used to create directories in Linux
5. mv — Move or rename files in Linux
6. cp — Similar usage as mv but for copying files in Linux
7. rm — Delete files or directories
8. touch — Create blank/empty files
9. ln — Create symbolic links (shortcuts) to other files
10. cat — Display file contents on the terminal
11. clear — Clear the terminal display
12. echo — Print any text that follows the command
13. less — Linux command to display paged outputs in the terminal
14. man — Access manual pages for all Linux commands
15. uname — Linux command to get basic information about the OS
16. whoami — Get the active username
17. tar — Command to extract and compress files in Linux
18. grep — Search for a string within an output
19. head — Return the specified number of lines from the top
20. tail — Return the specified number of lines from the bottom
21. diff — Find the difference between two files
22. cmp — Allows you to check if two files are identical
23. comm — Combines the functionality of diff and cmp
24. sort — Linux command to sort the content of a file while outputting
25. export — Export environment variables in Linux
26. zip — Zip files in Linux
27. unzip — Unzip files in Linux
28. ssh — Secure Shell command in Linux
29. service — Linux command to start and stop services
30. ps — Display active processes
31. kill and killall — Kill active processes by process ID or name
32. df — Display disk filesystem information
33. mount — Mount file systems in Linux
34. chmod — Command to change file permissions
35. chown — Command for granting ownership of files or folders
36. ifconfig — Display network interfaces and IP addresses
37. traceroute — Trace all the network hops to reach the destination
38. wget — Direct download files from the internet
39. ufw — Firewall command
40. iptables — Base firewall for all other firewall utilities to interface with
41. apt, pacman, yum, rpm — Package managers depending on the distro
42. sudo — Command to escalate privileges in Linux
43. cal — View a command-line calendar
44. alias — Create custom shortcuts for your regularly used commands
45. dd — Majorly used for creating bootable USB sticks
46. whereis — Locate the binary, source, and manual pages for a command
47. whatis — Find what a command is used for
48. top — View active processes live with their system usage
49. useradd and usermod — Add new user or change existing users data
50. passwd — Create or update passwords for existing users.
Learn more about each command's real-time use case :
1. ls — The most frequently used command in Linux to list directories.
2. pwd — Print working directory command in Linux
3. cd — Linux command to navigate through directories
4. mkdir — Command used to create directories in Linux
5. mv — Move or rename files in Linux
6. cp — Similar usage as mv but for copying files in Linux
7. rm — Delete files or directories
8. touch — Create blank/empty files
9. ln — Create symbolic links (shortcuts) to other files
10. cat — Display file contents on the terminal
11. clear — Clear the terminal display
12. echo — Print any text that follows the command.
13. less — Linux command to display paged outputs in the terminal.
14. man — Access manual pages for all Linux commands ;
The man command in Linux is used to display the manual pages of Linux commands and other system functionalities.
15. uname — Linux command to get basic information about the OS
16. whoami — Get the active username
17. tar — Command to extract and compress files in Linux
18. grep — Search for a string within an output
19. head — Return the specified number of lines from the top
20. tail — Return the specified number of lines from the bottom
21. diff — Find the difference between two files
22. cmp — Allows you to check if two files are identical.
23. comm — Combines the functionality of diff and cmp
24. sort — Linux command to sort the content of a file while outputting
25. export — Export environment variables in Linux
26. zip — Zip files in Linux
27. unzip — Unzip files in Linux
28. ssh — Secure Shell command in Linux
ssh username@hostname
29. service — Linux command to start and stop services
root@ubuntu:~ →> service ssh status
root@ubuntu:~ →> service ssh stop
root@ubuntu:~ →> service ssh start
30. ps — Display active processes
31. kill and killall — Kill active processes by process ID or name
32. df — Display disk filesystem information
33. mount — Mount file systems in Linux.
34. chmod — Command to change file permissions
35. chown — Command for granting ownership of files or folders.
36. ifconfig — Display network interfaces and IP addresses
37. traceroute — Trace all the network hops to reach the destination
38. wget — Direct download files from the internet.
39. ufw — Firewall command
40. iptables — Base firewall for all other firewall utilities to interface with
41. apt, pacman, yum, rpm — Package managers depending on the distro.
Debian and Debian-based distros — apt install <package name>
Arch and Arch-based distros — pacman -S <package name>
Red Hat and Red Hat-based distros — yum install <package name>
Fedora and CentOS — yum install <package>
42. sudo — Command to escalate privileges in Linux.
43. cal — View a command-line calendar.
44. alias — Create custom shortcuts for your regularly used commands.
45. dd — Majorly used for creating bootable USB sticks
46. whereis — Locate the binary, source, and manual pages for a command.
47. whatis — Find what a command is used for
48. top — View active processes live with their system usage
49. useradd and usermod — Add new user or change existing users data.
50. passwd — Create or update passwords for existing users.
Credits : digitalocean
https://github.com/gefkkd/-Mastering-the-Command-Line-.git
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